-/* hash functions
-
- These are needed when reading an object file. */
-
-/* allocate new vms_hash_entry
- keep the symbol name and a pointer to the bfd symbol in the table */
-
-struct bfd_hash_entry *
-_bfd_vms_hash_newfunc (entry, table, string)
- struct bfd_hash_entry *entry;
- struct bfd_hash_table *table;
- const char *string;
-{
- vms_symbol_entry *ret;
-
-#if VMS_DEBUG
- vms_debug (5, "_bfd_vms_hash_newfunc(%p, %p, %s)\n", entry, table, string);
-#endif
-
- if (entry == (struct bfd_hash_entry *)NULL)
- {
- ret = (vms_symbol_entry *)
- bfd_hash_allocate (table, sizeof (vms_symbol_entry));
- if (ret == (vms_symbol_entry *) NULL)
- {
- bfd_set_error (bfd_error_no_memory);
- return (struct bfd_hash_entry *)NULL;
- }
- entry = (struct bfd_hash_entry *) ret;
- }
-
- /* Call the allocation method of the base class. */
-
- ret = (vms_symbol_entry *) bfd_hash_newfunc (entry, table, string);
-#if VMS_DEBUG
- vms_debug (6, "_bfd_vms_hash_newfunc ret %p\n", ret);
-#endif
-
- ret->symbol = (asymbol *)NULL;
-
- return (struct bfd_hash_entry *)ret;
-}
-\f
-/* object file input functions */
-
-/* Return type and length from record header (buf) on Alpha. */
-
-void
-_bfd_vms_get_header_values (abfd, buf, type, length)
- bfd *abfd ATTRIBUTE_UNUSED;
- unsigned char *buf;
- int *type;
- int *length;
-{
- if (type != 0)
- *type = bfd_getl16 (buf);
- buf += 2;
- if (length != 0)
- *length = bfd_getl16 (buf);
-
-#if VMS_DEBUG
- vms_debug (10, "_bfd_vms_get_header_values type %x, length %x\n", (type?*type:0), (length?*length:0));
-#endif
-
- return;
-}
-
-/* Get next record from object file to vms_buf
- set PRIV(buf_size) and return it
-
- this is a little tricky since it should be portable.
-
- the openVMS object file has 'variable length' which means that
- read() returns data in chunks of (hopefully) correct and expected
- size. The linker (and other tools on vms) depend on that. Unix doesn't
- know about 'formatted' files, so reading and writing such an object
- file in a unix environment is not trivial.
-
- With the tool 'file' (available on all vms ftp sites), one
- can view and change the attributes of a file. Changing from
- 'variable length' to 'fixed length, 512 bytes' reveals the
- record length at the first 2 bytes of every record. The same
- happens during the transfer of object files from vms to unix,
- at least with ucx, dec's implementation of tcp/ip.
-
- The vms format repeats the length at bytes 2 & 3 of every record.
-
- On the first call (file_format == FF_UNKNOWN) we check if
- the first and the third byte pair (!) of the record match.
- If they do it's an object file in an unix environment or with
- wrong attributes (FF_FOREIGN), else we should be in a vms
- environment where read() returns the record size (FF_NATIVE).
-
- reading is always done in 2 steps.
- first just the record header is read and the length extracted
- by get_header_values
- then the read buffer is adjusted and the remaining bytes are
- read in.
-
- all file i/o is always done on even file positions */
-
-int
-_bfd_vms_get_record (abfd)
- bfd *abfd;
-{
- int test_len, test_start, remaining;
- unsigned char *vms_buf;
-
-#if VMS_DEBUG
- vms_debug (8, "_bfd_vms_get_record\n");
-#endif
-
- /* minimum is 6 bytes on Alpha
- (2 bytes length, 2 bytes record id, 2 bytes length repeated)
-
- on VAX there's no length information in the record
- so start with OBJ_S_C_MAXRECSIZ */
-
- if (PRIV (buf_size) == 0)
- {
- bfd_size_type amt;
-
- if (PRIV (is_vax))
- {
- amt = OBJ_S_C_MAXRECSIZ;
- PRIV (file_format) = FF_VAX;
- }
- else
- amt = 6;
- PRIV (vms_buf) = (unsigned char *) bfd_malloc (amt);
- PRIV (buf_size) = amt;
- }
-
- vms_buf = PRIV (vms_buf);
-
- if (vms_buf == 0)
- return -1;
-
- switch (PRIV (file_format))
- {
- case FF_UNKNOWN:
- case FF_FOREIGN:
- test_len = 6; /* probe 6 bytes */
- test_start = 2; /* where the record starts */
- break;
-
- case FF_NATIVE:
- test_len = 4;
- test_start = 0;
- break;
-
- default:
- case FF_VAX:
- test_len = 0;
- test_start = 0;
- break;
- }
-
- /* skip odd alignment byte */